EP5358LUI/EP5358HUI 600mA Synchronous Buck Regulator with Integrated Inductor RoHS Compliant Halogen Free Description Features The EP5358xUI (x = L or H) is rated for up to Integrated Inductor Technology 600mA of continuous output current. The 2.5mm x 2.25mm x 1.1mm uQFN package EP5358xUI integrates MOSFET switches, 2 Total Solution Footprint 12mm control, compensation, and the magnetics in an advanced 2.5mm x 2.25mm micro-QFN Low V ripple for RF compatibility OUT Package. High efficiency, up to 93% Integrated magnetics enables a tiny solution Up to 600mA continuous output current footprint, low output ripple, low part-count, and Less than 1A standby current high reliability, while maintaining high efficiency. The complete solution can be implemented in as 5 MHz switching frequency 2 little as 12mm . 3 pin VID for glitch free voltage scaling The EP5358xUI uses a 3-pin VID to easily select V Range 0.6V to V 0.25V OUT IN the output voltage setting. Output voltage Short circuit and over current protection settings are available in 2 optimized ranges providing coverage for typical V settings. UVLO and thermal protection OUT IC level reliability in a PowerSOC solution The VID pins can be changed on the fly for fast dynamic voltage scaling. EP5358LUI further has the option to use an external voltage divider. Application The EP5358xUI is a perfect solution for noise sensitive and space constrained applications that Wireless and RF applications require high efficiency. Wireless broad band data cards Smart phone and portable media players Advanced Low Power Processors, DSP, IO, Memory, Video, Multimedia Engines AV V IN SENSE V V IN OUT PV V IN OUT ENABLE 10uF 2.2uF EP5358HUI EP5358xUI V S0 V S1 V S2 AGND PGND 4.75mm Figure 2: Typical Application Schematic Figure 1: Total Solution Footprint. www.enpirion.com 03541 09/23/2010 Rev: D 2.25mm 2.2uF 10uF EP5358LUI/EP5358HUI Ordering Information Pin Assignments (Top View) 16 15 Part Number Comment Package 1 NC(SW) 14 PVIN EP5358LUI LOW VID Range 16-pin QFN T&R 2 PGND 13 AVIN EP5358HUI HIGH VID Range 16-pin QFN T&R PGND 3 12 ENABLE VFB 4 11 VS0 EP5358LUI-E EP5358LUI Evaluation Board VSENSE 5 10 VS1 EP5358HUI-E EP5358HUI Evaluation Board AGND VS2 6 9 7 8 Figure 3: EP5358LUI Pin Out Diagram (Top View) 16 15 1 NC(SW) 14 PVIN PGND 2 13 AVIN PGND 3 12 ENABLE NC 4 11 VS0 VSENSE VS1 5 10 AGND 9 VS2 6 7 8 Figure 4: EP5358HUI Pin Out Diagram (Top View) Pin Description PIN NAME FUNCTION NO CONNECT These pins are internally connected to the common switching node of the 1, 15, internal MOSFETs. NC (SW) pins are not to be electrically connected to any external signal, NC(SW) 16 ground, or voltage. However, they must be soldered to the PCB. Failure to follow this guideline may result in part malfunction or damage to the device. Power ground. Connect these pins together and to the ground electrode of the Input and 2,3 PGND output filter capacitors. EP5358LUI: Feed back pin for external divider option. 4 VFB/NC EP5358HUI: No Connect 5 VSENSE Sense pin for preset output voltages. Refer to application section for proper configuration. Analog ground. This is the quiet ground for the internal control circuitry, and the ground 6 AGND return for external feedback voltage divider 7, 8 VOUT Regulated Output Voltage. Refer to application section for proper layout and decoupling. Output voltage select. VS2 = pin 9, VS1 = pin 10, VS0 = pin 11. 9, 10, VS2, VS1, EP5358LUI: Selects one of seven preset output voltages or an external resistor divider. 11 VS0 EP5358HUI: Selects one of eight preset output voltages. (Refer to section on output voltage select for more details.) 12 ENABLE Output Enable. Enable = logic high Disable = logic low 13 AVIN Input power supply for the controller circuitry. 14 PVIN Input Voltage for the MOSFET switches. Enpirion 2010 all rights reserved, E&OE 2 www.enpirion.com 03541 09/23/2010 Rev: D VOUT NC(SW) VOUT NC(SW) EP5358HUI EP5358LUI VOUT VOUT NC(SW) NC(SW)